[Elecraft] normal K3 voltage drop on TX

[Richard Solomon]

It also depends on the wire size and length of run.
If you get a supply with Sense Terminals you can eliminate that problem.

73, Dick, W1KSZ

On 8/21/2015 8:12 AM, Jerry Moore wrote:
> If you google around you'll find the Astron VS-35M is known to have issues
> with voltage sag under load.
>
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
> Charles Yahrling
> Sent: Friday, August 21, 2015 11:06 AM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] normal K3 voltage drop on TX
>
> What would be a normal value on the FP voltage display when tx at 100W,
> using factory fused cables? No sub installed.
>
> PS is Astron VS-35M linear, voltage set at 13.9 idling per FP display.
> drops to 11.1 on TX.  Current varies but up to 15.5A indicated. Specs call
> for 17-22A tx @100W.
>
> I suspect bad pass transistor and/or high drop over fuses, but want to
> establish normal indication for tx drop.  11.1v seems way out.
>
> tnx in advance
>
> --
> de AB1VL
> NAQCC #6799
>
> ab1vl.com
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